--- /dev/null
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// rustc-env:RUST_NEW_ERROR_FORMAT
+
+#![feature(const_fn)]
+
+trait Foo {
+ fn f() -> u32;
+ const fn g();
+}
+
+impl Foo for u32 {
+ const fn f() -> u32 { 22 }
+ fn g() {}
+}
+
+fn main() { }
--- /dev/null
+error[E0379]: trait fns cannot be declared const
+ --> $DIR/const-fn-in-trait.rs:17:5
+ |
+17 | const fn g();
+ | ^^^^^ trait fns cannot be const
+
+error[E0379]: trait fns cannot be declared const
+ --> $DIR/const-fn-in-trait.rs:21:5
+ |
+21 | const fn f() -> u32 { 22 }
+ | ^^^^^ trait fns cannot be const
+
+error: aborting due to 2 previous errors
+